Speaker



FIG. 1 is a perspective view of a speaker, showing our new design;

FIG. 2 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in FIG. 4 depict environmental matter and form no part of the claimed design. 

We claim the ornamental design for a speaker, as shown and described. 